If the ratio of the lengths of two sides of a triangle is 7:5 and the perimeter

Practice Questions

Q1
If the ratio of the lengths of two sides of a triangle is 7:5 and the perimeter is 48 cm, what is the length of the longer side?
  1. 28 cm
  2. 20 cm
  3. 24 cm
  4. 16 cm

Questions & Step-by-Step Solutions

If the ratio of the lengths of two sides of a triangle is 7:5 and the perimeter is 48 cm, what is the length of the longer side?
  • Step 1: Understand that the ratio of the lengths of the two sides of the triangle is 7:5.
  • Step 2: Let the lengths of the sides be represented as 7x (for the longer side) and 5x (for the shorter side).
  • Step 3: Write the equation for the perimeter of the triangle: 7x + 5x = 48.
  • Step 4: Combine the terms on the left side: 12x = 48.
  • Step 5: Solve for x by dividing both sides by 12: x = 48 / 12, which gives x = 4.
  • Step 6: Find the length of the longer side by calculating 7x: 7 * 4 = 28 cm.
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